Definition of Visible light

1. Noun. (physics) the part of the electromagnetic spectrum, between infrared and ultraviolet, that is visible to the human eye ¹

¹ Source: wiktionary.com

Medical Definition of Visible light

1. Electromagnetic radiation with wavelengths between 400 nanometres and 750 nanometres. Electromagnetic radiation within this range can be detected by the human eye. Colours depend on the wavelength lengths, a short wavelength (the 400 nm side) looks blue and a long wavelength (the 750 nm side) looks red.
(09 Oct 1997)

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